Study On Comprehensive Adjustment Technique In The Secondary Reservoirs In Sabei Oilfield

The secondary reservoirs geological reserves cover54.7%of SaBei Oilfield geologicalreserves. The Secondary Reservoirs geological reserves is main potential in Twelfth Five-yearPlan period or long time.But the secondary reservoirs is different from class I reservoirs insedimentary characteristics. Characteristics of the secondary reservoirs is more layer thinthickness complicated plane phase﹑severe heterogeneity﹑variatied connected but also thesecondary reservoirs small well spacing and fast dynamic,so polymer flooding adjustment ofthe secondary reservoirs is very difficulty. Further study in sedimentary characteristics andperfect in polymer flooding adjustment is more and more important.The research region of this dissertation is the first secondary reservoirs in SaBei Oilfield-the Secondary Reservoirs of Bei er xi xi layer. Through using accurate geological researchcombing high-resolution sequence stratigraphy and river fine sedimentology, make use ofsecondary reservoirs sedimentation model research achievement, aim at secondary reservoirsdifferent sedimentation model Reservoir development characteristics, divide foursedimentation model including large compound channel sand body sedimentation model、Medium distributary channel deposition model、small river branches in the shape of a lump ofsand body sedimentary mode、narrow channel sand body（lensing、beads-strings），expliciteach depositional model of remaining oil distribution of the situation。On that basis，thesecondary oil combined with different dynamic variation characteristics of sedimentarymode.Optimize injection parameters and adjust measures,for large compound channel sandbody take the depth profile,improve concentration into.Mining thick the residual oilreservoir.According to medium-sized channel sand body reservoir development,the remainingoil distribution，Personalize adjustment、small in channel sand body,narrow channel sand bodytake a low concentration injected,measures for reform,improve the thin and poor oilproducing extent.Outstanding secondary oil polymer flooding development personalized.Thecharacteristics of the adjusted quickly,Good results have been achieved.This paper not onlythe overall evaluation of the secondary oil polymer injection effective features.And presentsdifferent sedimentary mode effective production characteristics,on subsequent development ofthe secondary oil block provide experience for reference.